Dubuque YMCA Building

Upper Main Street Historic District is a nationally recognized historic district located in Dubuque, Iowa, United States. It was listed on the National Register of Historic Places in 2005. At the time of its nomination it consisted of 24 resources, which included 18 contributing buildings, and six non-contributing buildings. In 2011 the boundaries of the district were expanded to include four additional buildings on the west side of the 900 block of Main Street. The district is the northern end of the city's most important commercial street. It is situated on a level terrace above the downtown area, located to the east. The buildings located on the east side of Main Street have exposed foundations along the alley because the grade descends in that direction. For the most part the district is made up of commercial buildings, although there is one house, four rowhouses, and a church. All of the buildings are masonry construction, and they are between one and four stories tall. The bell tower of St. Luke's United Methodist Church (1896) is equivalent to an eight-story building. St. Luke's Church and the Interstate Power Company Building (1894, 1956) are individually listed on the National Register.

The Security Building, also known as the Stampfer Building, is a historic structure in Dubuque, Iowa, United States. The cream-colored building is associated with the J. F. Stampfer Co. department store.

The Interstate Power Company Building, also known as the Masonic Hall and the Dubuque Electric Company, is a historic building located in Dubuque, Iowa, United States. While a single facility, this is actually two buildings: an 1894 three-story Queen Anne, and a 1956 three-story (later four-story) Modern Movement free-standing addition. The Dubuque Electric Company moved into the older building in 1924, and the following year it was reorganized as Interstate Power Company. This became the headquarters of a regional electrical utility that, at one time, served parts of eight states and a Canadian province. The Great Depression and antitrust court rulings altered the company's fortunes. The 1956 addition was designed to hold the companies large computers in an air-conditioned environment, in addition to office space. Other additions to the building were made in 1962, 1981 and 1989. The facility remained Interstate's corporate headquarters until Alliant Energy bought and absorbed the company in 1996. Alliant continued to use the building for a period of time afterward. It was included as a contributing property in the Upper Main Street Historic District in 2005, and it was individually listed on the National Register of Historic Places in 2008.

The Town Clock is a large clock that stands in downtown Dubuque, Iowa. The clock has stood over the city for over 140 years. The present clock is the second "Town Clock"; the first collapsed in the 1870s, killing three people. The building on which it originally stood is listed on the National Register of Historic Places, but the clock tower itself is not.

The Grand Opera House is an opera house located at the corner of 8th and Iowa Streets in Dubuque, Iowa that was built in 1890. It was listed on the National Register of Historic Places in 2002.It was deemed important as a "national treasure". The theatre has the largest of all stages ever in Dubuque, and is Dubuque's only surviving opera house. It is architecturally important as an early Richardsonian Romanesque building in Dubuque and as a salient work of Chicago architect Willoughby James Edbrooke. It is Edbrooke's only surviving opera house, and he used its design in his design portfolio that won him the position of Supervising Architect of the U.S. Treasury Department in 1891. Its design is said to be "representative of Edbrooke's smooth exterior wall interpretation of the Richardsonian Romanesque style." It is also historically important from its association with high-quality theatre in Dubuque during 1890-1928. The theater has been preserved with great historic integrity and, in 2002, was being restored for continuing use in live stage entertainment. Its history is extremely well documented.In 2015 performance events at the theater marked its 125th anniversary.

The Dubuque County Jail is a historic building at 36 East 8th Street in Dubuque, Iowa, United States. Completed in 1858, the jail is an example of the uncommon Egyptian Revival style. It is architecturally a highly original work of John F. Rague, who also designed the 1837 Old Capitol of Illinois and the 1840 Territorial Capitol of Iowa. The building was designated a National Historic Landmark for its architecture in 1987. It served as a jail for more than a century, became a museum in 1975, and was converted into county offices in 2016.

The Dubuque Museum of Art is an art museum in Dubuque, Iowa. The museum is known for its collection of works by Grant Wood. The collections include more than 2,500 works of art housed in the former Statesman Bank building in downtown Dubuque. The museum was founded in 1987, although it evolved out of the Dubuque Art Association which had been operating sporadically since 1874.

The Dubuque County Courthouse is located on Central Avenue, between 7th and 8th Streets, in Dubuque, Iowa, United States. The current structure was built from 1891 to 1893 to replace an earlier building. These are believed to be the only two structures to house the county courts and administrative offices.The courthouse houses several county government offices including the county auditor, treasurer, attorney, and facilities for the Iowa District Court for Dubuque County.

Roshek Brothers Department Store was a large retail store in downtown Dubuque, Iowa. The company was founded by J.J.and F.H. Roshek. In its prime, Roshek's was the primary shopping destination in Dubuque and was the largest department store in the state of Iowa. The building has been listed on the National Register of Historic Places.

St. Luke's United Methodist Church, also known as St. Luke's Methodist and as St. Luke's United Methodist, is a historic Richardsonian Romanesque-style church located at 1199 Main Street in Dubuque, Iowa. It was individually listed on the National Register of Historic Places in 1998, and as a contributing property in the Upper Main Street Historic District in 2005. It is part of the Iowa Conference of the United Methodist Church. The church has more Tiffany windows than any other church in the state.According to its NRHP nomination, the building is significant for its history in religion in Dubuque, for its Richardsonian Romanesque (unique in Dubuque), and for its Tiffany glass.: 15 

The Carnegie-Stout Public Library is located in Dubuque, Iowa, United States. The public library had its beginnings with the Young Men's Literary Association, established in 1859, and their book collection was the basis for the library's collection. The books were housed in a variety of buildings over the years. The community applied for a grant from Andrew Carnegie who on January 12, 1901, contributed $71,500 to build the library building. Local businessman Frank D. Stout donated the property, which was worth $20,000, in honor of his father Henry L. Stout. The two-story Bedford stone and brick building was designed by Chicago architects W. G. Williamson and John Spencer. It is considered one of the finest examples of the Classical tradition of Beaux-Arts architecture in Iowa. The main facade is dominated by a Roman Corinthian portico that was modeled after the Pantheon in Rome. Its fluted columns are matched with pilasters on the wall behind. The building was dedicated on October 17, 1902, and it opened three days later. It was individually listed on the National Register of Historic Places in 1975, and it was included as a contributing property in the Jackson Park Historic District in 1986. An addition was added to the east side of the building in 1981.

Dubuque City Hall is located in Dubuque, Iowa, United States. The building was designed by J.N. Moody after Faneuil Hall in Boston and the Fulton Street Market in New York City. Dubuque architect John F. Rague served as the supervising architect during construction. Following a Medieval tradition, the city market was located on the first floor, municipal offices were located on the second floor, and a ballroom for civic events was located on the third floor.The three-story brick structure rests on a raised limestone basement. It features a gable roof with bracketed eaves. Each gable has a circular window. The 11-foot (3.4 m) tall windows are located in bays defined by arches. The building was first occupied in February 1858. Initially, the main floor was divided into stalls. They were converted into additional office space for the city when the market relocated. The third floor ballroom was converted into an archery and pistol range for the police department, a bowling alley, and a horseshoe pitching area. The original cupola, which held a bell and four-faced clock, became deteriorated and was removed from the building in 1954. The bell was placed in the plaza next to city hall. The building was listed on the National Register of Historic Places in 1972. A new cupola was created using the original design, and it was erected in 1990. The bell was returned to the tower at that time.